Hello right now I am rebuilding my 2016 Ninja 300 ABS. My friend gave it to me for free thinking it was just a starter issue which it was the starter gear holder broke(seems to happen I found on other forum). I got a donor engine for very cheap 100 basically a new engine which you will see in pics. I am going to swap crankcase and in the process I noticed both engines had blown piston rod bearing that connects to crankshaft. I will use parts from both engines rebuild it together. Before people start with I should have bought new engine or rebuild kit, its corona quarantine and I am good at working on vehicles so I am learning how engine goes to together and will post the process here along with link to service manual.